Adjustable handsaw



G. McKENNEY.

ADJUSTABLE HANDSAW. APPLiCATION FILED NOV. 3. 1919.

1,349,421 Patented Aug. 10,1920.

3 vwantoa UNITED STATES PATENT OFFICE.

GAIKEN MGKENNEY, 0F BANGOR, MAINE.

ADJUSTABLE HA-NDSAW.

Application filed-November 3, 1919. Serial No. 335,297.

To all whom it may concern Be it known that I, GALEJ MoKnNNnY, a citizenof the United States, residing at Bangor, in the county of Penobscot,State of Maine, have invented certain new and useful Improvements inAdjustable I-Iandsaws, of which the following is a description,reference being had to the accompanying drawing and to the figures ofreference marked thereon.

This invention relates to saws and more particularly to hand sawsadapted to receive blades of varying lengths.

The main object of this invention is to providea hand saw having anadjustment to accommodate saw blades of varying lengths and providedwith additional means for varying the tension of the saw blade.

A further object of this invention relates to the improved means foradjusting the frame to receive the different lengths of blades.

A still further object of this invention resides in the clampingconnection between the handle and the frame for varying the tension ofthe blades.

These and other objects will in part be obvious and will in part behereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment of theinvention:-

Figure 1 is a side elevation of my improved saw,

Fig. 2 is across section of the frame adjusting means for accommodatingdifferent lengths of blades,

Fig. 3 is a similar sectional view of the clamp connecting the frame andthe handle,

Fig. i is a sectional end view thereof,

Fig. 5 is a modification of the construction set forth in Fig. 2, and

6 is a sectional view taken from the construction shown in Fig. 5.

In general the invention is shown in connection with a buck saw andcomprises a curved tubular frame provided with an extensible adjustmentbetween the ends thereof, preferably in the form of telescoping membersat one end having interlocking means for holding these members invarious adjusted positions. To one end of the frame is pivoted thehandle which receives between it and the other end of the curved frame,the saw blade, while between the opposite end of the handle and theframe is arranged an adjustable member for tensioning the saw blade.

Referring more particularly to the drawings, the invention comprises aframe consisting of a curved rod 1 which in the present instance isshown as tubular in form. Telescoping the outer end of this rod or innersleeve is a tubular outer sleeve 2 provided with a series of adjustingholes 3 adapted to receive an interlocking member in the form of a lug4: secured in any suitable manner to the free end of a leaf spring 5attached preferably to the inner side of the tube 1. Secured integrallywith or fitting within the end of the tubular sleeve 2 is a casting orinner section 6 bifurcated at its outer end and pivotally connected toan intermediate portion of a saw handle 7 which may be of wood or anydesired material. Between the other end of the frame and one extremityof the handle is detachably connected a saw blade 8.

To provide a means for tensioning the saw blade, the other or outer endof the handle is adapted to-receive the hooked end of a rod 9 adjustablyconnected to a similar rod 10 by means of the turn-buckle 11. The end ofrod 10 is provided with a hook connection to the improved clampingdevice shown in Figs. 3 and i, consisting of a clamping member 12adapted to surround and slidably engage the tubular frame 1 and providedwith two upstanding ears 13 perforated to receive a bolt 14 providedwith the usual wing 111 .015 for tightening the same so that said membermay be locked to the frame in any set position therealong. Pivotallymounted intermediate its ends on this bolt between the upstanding ears13is arranged a locking lever 16 perforated at its outer end to receivethe hooked end of the rod 10. The inner end of the lever is backed offas at 17 so that when pressure on the rod 10 is released, the lever maybe swung counterclockwise to release the clamp 12.

In -Figs. 5 and 6 I have shown a modification of the telescopicinterlock between the tubular members 1 and 2. In this arrangement,instead of using the inner spring leaf locking lug, the outer sleeve 2is provided with a longitudinal slot 18 having lateral branch slots 19adapted to receive a locking lug 20, riveted or otherwise securedthrough the outer side of the inner sleeve 1.

In the use of this improved construction, the frame 1 may be adjusted sothat longer or shorter blades can be inserted between the ends of thehandle and the frame 1, after which the clamp 12 is slid along the frame1 to the approximate adjustment for securing the required tension on theblade 8. The turn buckle 11 is then adjusted until an exact and nicetension of the blade is secured; 'It will be clearly understood thatwith this combined adjustment, the saw is adapted to receive not onlydifferent lengths of blades, but each blade can be properly tensioned asthe circumstances demand. It is further obvious that by the use of thesecombined adjustments the correct angularity of the handle to the blademay be maintained when a longer or shorter blade is inserted.

It is obvious that minor changes in the details of construction and thearrangement of parts may be made without departing from the spirit ofthe invention as set forth inthe appended claims.

Having thus described the invention, what I claim as new and desire tosecure by Letters-Patent is 1. A handsaw comprising a frame, a handlepermanently pivoted to said frame, a saw blade connected at one end tosaid frame and at its other end to said handle, means disposed betweenthe ends of the frame whereby said frame may be adjusted as to lengthand set for several predetermined fixed lengths, an adjustable membercarried by said frame, and a rod connected to said adjustable member andto the upper end of the handle, said rod having between its ends meanswhereby it may be adjusted for varying its length.

2. A handsaw comprising a frame, a handle permanently pivoted thereto, asaw blade detachably connected at one end to said frame and at its otherend to said handle, means disposed between the ends of the frame wherebysaid frame may be adjusted as to length and set for severalpredetermined fixed lengths, a slidable member having means forfrictionally gripping the frame whereby said slidable member may be heldin fixed position on the frame, and a rod connected at one end to saidslidable member and at its other end to the upper end of the handle,said rod having a turn buckle disposed between its ends whereby thelength of the rod may be varied for putting the saw blade under tension.

3. A hand saw comprising a frame including an extensible portion, ahandle pivoted thereto, a blade connected to said frame and handle, amember slidable along said frame, and an adjustable connection betweensaid slidable member and said handle, the tightening of which clampssaid member on said frame, and further means for locking said memberirrespective of said tightening.

l. A hand saw comprising a frame includ ing an extensible portion, ahandle pivoted to said frame, a blade connected to said frame andhandle, a slidable member engaging said frame, a lever pivotedintermediate its ends to said member, the inner end of said lever havinga backed-off end engag' ing said frame, and an adjustable connectionbetween said lever and said handle, and means for locking said member tosaid frame.

5. A hand saw comprising an extensible frame including a sleeve providedwith locking notches, an inner section, a locking pin engaging therewithfor movement into and out of said notches, a handle pivoted to saidsleeve, a blade connected to said frame and handle, a slidable memberengaging and locking on said frame, and a turnbuckle connecting saidmember to said handle.

In testimony whereof I affix my signature.

GALEN MGKENNEY.

